Automatic oil cup



June 3, 1924.

G. FRASER AUTOMATIC OIL CUP Filed Oct. 11 1922 I a .H 7 m H; nw \wvz T4Jv 2g \\E- \Q 3 j Z p m Patented June 3, 1924, y

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Application filed October 11, 1922. Serial No. 593,788.

To all whom z't mag concern;

Be it known that I, GEORGE Fmxsnn, of the village of Sioux Lookout, inthe Province of Ontario, Canada, have invented certain new and usefulImprovements in Automatic Oil Cups, of which'the following is thespecification.

The invention relates to improvements in automatic-oil cups andparticularly to such devices as are in use in connection with the airpumps of-locomotives and the like and the principal object ofthe'invention is the provision of a device which is automatic inoperation and simple in construction, being controlled by thereciprocations of the piston otthe air pump to deliver oil into thecylin-- der thereof at intervals in comparatively small quantities, asdrop by drop. The air pump controls theoperationof the oil cup by meansof the variations in the air pressure caused by the reciprocations oithe piston.

A further and more specific object is to arrange the structure of theoil cup such that the same can be readily taken apart or assembled andsuch-that the valve plunger can be easily removed if desired in order topermit of the substitution of a similar valve plunger having a largerfeed passage to accommodate a different kind of oil. a

With the above more important objects in view the invention consistsessentially in the arrangementand construction of parts hereinafter moreparticularlydescribed and later pointed out in .the appended claims,reference being .had to the accompanying drawing in which:

Fig. 1 is a side View of the automatic oil cup.

Fig. 2 is an enlarged detailed vertical sectional view centrally throughthe cup.

Fig. 3 is a side View of the valve plunger.

Fig. 4 is a horizontal sectional view at 4-4 Fig. 3.

In the drawing like characters of reference indicate corresponding partsin the sevral figures.

The body 1 of the device is in the form of a hollow oil receiving casingor cylindrical receptacle having the upper end thereof open andexteriorly screw threaded as indicated at 2 and the lower end thereofreduced and formed with downward and upward extensions 3 and 4 providinga cylindrical plunger receiving tubular casing. The upper and lower endsof this latter casing are 6Xi riorly screw threaded, the lower endreceiving a flanged coupling 5 and the upper end receivinga cap screw 6.The extension 4, which, it will be observed, extends upwardly within thebottom of the receptacle 1, 'isprovided at the bottom of the receptaclewith an inlet opening or port 7. The cap 6 is provided] with. a tubularextension 8 which passes well toward th topv of the receptacle andprovides an air escape passage 9 con necting the upper end of theextension 4 with the top end of the receptacle 1 A screw cap-or cover 10is screw threaded onto the upper end of the receptacle 1 and the coveris also provided with an'airescape passage 11. i I A feed pipe 12 isconnected by the coupling 5 to the lower end of the. extension 3and'this feed pipe passes to the cylinder of the air'pump of thelocomotive and. feeds the oil in the manner, as shortly described, tothe cylinder.

. The lower end of the extension 3 is sup-' plied with an interior ledgeor seat 13 which is adapted to act as a stop to limit the lowerinostposition of the valve plunger 14 which is slidably mounted within theextensions 3 and 4. The valve plunger is prevented from rotating withinthe extensions in any suitable manner, such as by the provision of atongue 15 formed at the upper end thereof, the tongue being slidablyreceived within a lengthwise extending slot or groove 16 provided in theextension 4, the slot being of suflicient length to permit of the 7 fullend sliding movement of the plunger,

The plunger is fitted with an interior centrally disposed andlongitudinally extending feed passage 17 which communicates with theside port 18, the port 18 being designed in the uppermost position ofthe plunger to register with the port 7.

The plunger is held normally seated on the ledge 13 by the action of acoiled compression spring 19 interposed between the cap 6 and the upperend of the plunger and having the ends seated in suitable socketscounter sunk in such latter parts.

The 'lower end of the plunger carries a valve 20 adapted to opendownwardly to permit the passage of the oil to the pipe 12 and to closeupwardly under the action of the air pressure in the pipe 12. The valveemployed is provided with a flat sided shank or stem 21 which isslidably received within a pocket 22 formed in the lower end of theplunger and the valve is prevented from escaping from the pocket bycutting an annular groove 23 in the stern and passing a pin 24 acrossthe groove, the pin being carried by the plunger. Sufficient clearanceis provided in the groove to permit of the opening and closing of thevalve, it being understood that the valve seats against the lower end ofthe plunger. The valve is shown open in Figure 2 of the drawing,

The body of the plunger is exteriorly cut away to provide an annularchamber 25 which in all positions of the plunger in communication withan aires'cape opening 26 formed in the side of the extension 3. Thislatter arrangement permits of the escape to atmosphere of any air underpressure which might leak past the lower end of the plunger.

The operation of the device is as follows, it being understood that thereceptacle 1 is filled with lubricating oil as indicated at 27 and thatthe pipe 12 is connected to the air pump cylinder of the locomotive. v

On the up stroke of the piston of the air pump the increase in thepressure of the air there'above operates through the pipe 12 toinitially force up and seat the valve 20 and prevents any passageof airthrough the passage 17 of the plunger after the'said valve has seated.The air pressure overcomes the resistance of the spring 19 andaccordingly forces the plunger upwardly until the upper end thereofengages with the cap 6, at which time the ports 7 and 18 are inregistration. A small quantity of oil is accordingly permitted to flowfrom thereceptacle 1 through the ports into the passage 17.

On the return or down stroke of the piston of the air pump a partiaraeumn is created inthe upper portion of the cylinder thereof and thisdecreases the a pressure in the pipe '12 and permits the spring 19 toforce the plunger doW'nand pass theports out of registration; It alsofrees the valve 20 to open so that the small quantity of oil in the feedpassage will be passed down the tube 12 to the cylinder of the air pumpbefore the piston starts its next upward stroke.

This delivery of a small quantity of oil to the cylinder during eachcycle of opera- 'tion of the piston efi'ectively lubricates the coverclosing the upper end of the receptacle and provided with an air escapepassage placing the interior of the receptacle in communication with theatmosphere, the bottom of said receptacle being provided with a centralopening and with tubular wall portions projecting in-opposite directionsand in line with said opening, means for closing and connecting "thelower tubular wall p'ortionto the cylinder of an air pump, a cap closingthe upper tubular Wall portion and equipped with a hollow extensionextending vertically therefrom to terminate at a point above the levelof the oil contained in the receptacle, and a pressure controlled valvemounted to slide in said tubula 'r wall portions and to control thepassage of oil from the receptacle to the cylinder of the "air pumpconnected therewith.

Signed at Winnipeg, this 1 day of April 1922.

GEORGE FRASER.

In the presence of- GERALD. S. RoXBuno-n, M. B. KELIJE'HER.

